lawson



(No Model.)

3 Sheets-Sheet 1.

A. T. LAWSON 85 S. DEAR.

DIFFERENTIAL GEAR FOR ROVING FRAMES, &c.

fig.

I/IIIIIIIIIIIIIIIIIIIIA- VI/(Ig/(I/{fl/ "III I.

Patented Dec. 18, 1888.

(No Model.) 3 Sheets-Sheet 2.

A. T. LAWSON 86 S. DEAR. DIFFERENTIAL GEAR FOR ROVING PRAMEs, &c.

No. 394,582. Patented Dec. 18, 1888.

N. PETERS. PhomLnho m nu. Washing! D, c.

l s sheets-sheet. a.

A. T. LAWSON 82; S. DEAR. DIFFERENTIAL GEAR FOR RDVING FRAMES, &c.

No. 394,582. Patented Dec. 18, 1888.

(No Model.)

UNITED STATES PATENT OFFICE.

ARTHUR TREDGOLD LAVSON AND SOMERVILLE DEAR, OF LEEDS, COUNTY OF YORK, ENGLAND.

DIFFERENTIAL GEAR FOR ROVlNG-FRAMES, 80C.

SPECIFICATION forming part of Letters Patent No. 394,582, dated December 18, 1888.

Application filed December 13, 1887. Serial No. 257,780.

(No model.)

Patented in England May 25, 1887, No. 7,605, and in France November 26, 1887, No. 187,221.

To aZZ whmn it may concern:

Be it known that we, ARTHUR TREDGOLD LAWsoN, engineer, and SoMERvILLE DEAR, manager, both residing at Hope Foundry, Leeds, in the county of York, England, subjects of the Queen of Great Britain, have invented certain new and useful Improvements in Differential Gears for Roving and Spinning Frames, (for which we have received Let- IO ters Patent in Great Britain, No. 7,605, dated May 25, 1887, and in France, No. 187,221, dated November 26, 1887,) of which the following is a specification.

This invention relates to improvements in I the construction of differential gears used in conjunction with the varying-motion mechanisms required for driving the bobbins of a roving or spinning frame.

The subject-matter claimed is hereinafter designated.

In the drawings, Figure 1 is a longitudinal sectionof the differential wheel. Figs. 2 and 3 are end elevations. of the toothed wheel B, which is loose upon the main shaft. 5 is a plan of the ring M, and Fig. 6 a plan of the ring 0. Fig. 7 is a back elevation of part of a rowing-frame, showing the cone-drums used for driving the wheel B and accelerating or retarding the speed at which it is driven. Fig. 8 is a sectional elevation of the roving-frame, showing the gearing by which motion is transmitted through the differential wheel to the bobbins.

A is the main driving-shaft of the rovingframe. B is the main toothed wheel of the differential gear loose upon it. C O are bosses on two opposite sides of the center of this wheel and carrying two short axes, G G. H H are pinions on one end of these axes, gearing with and driven by the internallytoothed wheel I, which is fixed upon the main shaft. 011 the opposite ends of the short axes G are the pinions K,which gear into and drive the sleeve-wheel L. The sleeve 9 of this wheel turns loosely upon the driving-shaft,

and at its opposite end carries a toothed pinion, 10, from which motion is transmitted to the bobbins, as hereinafter explained.

F is a part of the boss of the wheel B and Fig. -l is an eleration forms a sleeve over the boss J of the internal wheel, I.

M is a ring formed with overhung bosses N to support the ends of the short axes G, and is fixed to four projecting lugs, E, on one side of the rim of the wheel B. On the opposite 5 5 side the wheel has projecting from it two arms, D, to which is fixed a ring, O, which is provided with bosses P, to support the opposite ends of the short axes G to those which are supported by the bosses N.

lVe will now describe the means we adopt for giving motion to the wheel B and for transmitting motion from the sleeve 9 to the bobbins.

In Figs. 7 and 8, 1 is a box-frame end of the roving-frame, which serves both as a cover and support for the main gearing. 2 is a cone-shaft driven from the main shaft by gearing. (Not shown in the drawings.) 3 is a cone upon the shaft, from which power is trans- 7o mitted by means of a strap to a cone, 4, below it. Upon the axle or shaft of this cone is fixed a pinion, 5, which, through an intermediate wheel, 5, drives a pinion, 6, on the shaft 7, and upon the shaft 7 is a pinion, 8, gearing info the 7 5 main toothed wheel B of the differential wheel. From the socket 9 of the differential Wheel motion is conveyed through the wheels 10, 11, 12, and 13 to the bobbin-shaft 11, from which, with the bevel-pinions 15 and 16, the bobbin-wheels 17 17 17 are driven. On the upper part of the wheels are the bobbinplates 18 18, which give motion to the bobbins. The spindles 19 19 pass through the wheel-collars 20 20 on thelifter 21. The spindle-shaft 22 is driven, as usual, at uniform speed, and gives motion to the spindles with the bevel-pinion 23 gearing into the pinion 24, on which is a pinion, 25, gearing into the pinions 26 and 27 on the spindles. 0

The bobbin-shaft 14. and the spindle-shaf t 22 are, as heretofore, made of any desired length, and any desired number of pairs of bobbins and spindles are driven from them.

The varying motion is given to the bobbins through the differential wheel in the following manner: If the bottom cone, 4, and con sequently the toothed wheel B, of the differential wheel were not moving, the rate of revolution transmitted from the annular-wheel I. through the pinions in the diiferential wheel to the socket-wheel L would be exactly equal to that of the shaft A, and the socket-wheel from which the bobbins are driven would revolve'at the same speed as the wheel on. the shaft A from which the spindles are driven, only the two wheels would revolve in opposite directions. In this way the spindles and bobbins would be driven at the same speed and no winding could take place; but if the wheel 13 of the differential wheel be driven through the cones in the opposite direction to the shaftA the speed of the socket-wheel will be accelerated in the same ratio, and thus the excess speed of the bobbin over the spindle obtained. At the commencement of the bobbin the strap which works over the two cones is at the largest end of the upper cone, and thewh eel B, and consequently the bobbin, is driven at its maximum speed. WVith the deposit of every 1 yer of rove upon the bobbin the strap is traversed a little distance from the largest diameter of the top cone until with a full bobbin the minimum diameter is reached, giving the minimum rate of revolution to the bobbin.

Having now particularly described and as- The hereinbefore-described combination of parts for driving the bobbins of roving and spinning frames, consisting of a main driving-shaft, a toothed wheel loose upon it, gearing for driving this Wheel at varying speed, short axes parallel with the main shaft carried by the loose wheel, two pinions on each short axis, an internally-toothed wheel fixed on the main shaft and gearing with one of the pinions, a toothed wheel on a sleeve, which can turn loosely on the main shaft gearing with the other pinion, the ring fixed to projections from one side of the loose toothed wheel and carrying bearings for one extremity of the short axes, and a ring fixed to the opposite side of the loose toothed wheel and carrying bearings for supporting the opposite extremity of the short axes.

ARTHUR TREDGOLD LAWSON. SOMERVILLE DEAR. \Vitnesses:

HENRY S. LENTY, GEo. F. Moss, Clerks f0 T. at H Greemoood Tedle, Solicitors and Notaries Public, Leeds, England. 

